Effect of vegetation types on soil arbuscular mycorrhizal fungi and nitrogen-fixing bacterial communities in a karst region
Arbuscular mycorrhizal(AM)fungi and nitrogen-fixing bacteria play important roles in plant growth and recovery in degraded ecosystems.The desertification in karst regions has become more severe in recent decades.Evaluation of the fungal and bacterial diversity of such regions during vegetation restoration is required for effective protection and restoration in these regions.Therefore,we analyzed relationships among AM fungi and nitrogen-fixing bacteria abundances,plant species diversity,and soil properties in four typical ecosystems of vegetation restoration(tussock(TK),shrub(SB),secondary forest(SF),and primary forest(PF))in a karst region of southwest China.Abundance of AM fungi and nitrogen-fixing bacteria,plant species diversity,and soil nutrient levels increased from the tussock to the primary forest.The AM fungus,nitrogen-fixing bacterium,and plant community composition differed significantly between vegetation types(p < 0.05).Plant richness and pH were linked to the community composition of fungi and nitrogen-fixing bacteria,respectively.Available phosphorus,total nitrogen,and soil organic carbon levels and plant richness were positively correlated with the abundance of AM fungi and nitrogen-fixing bacteria(p < 0.05).The results suggested that abundance of AM fungi and nitrogen-fixing bacteria increased from the tussock to the primary forest and highlight the essentiality of these communities for vegetation restoration.
Arbuscular mycorrhizal fungi Nitrogen-fixing bacteria Diversity Vegetation type Karst region
Yirong Su Xiangbi Chen Xunyang He Fujing Pan Yueming Liang
Key Laboratory of Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agricultu Key Laboratory of Agro-ecological Processes in Subtropical Region,Institute of Subtropical Agricultu
国内会议
国土资源部广西岩溶动力学重点实验室和国土资源部岩溶生态系统与石漠化治理重点实验室2016年度学术委员会会议
广西桂林
英文
1-10
2016-12-02（万方平台首次上网日期，不代表论文的发表时间）